Inscrição na biblioteca: Guest
TSFP DL Home Arquivos Comitê executivo

EXPERIMENTAL AND NUMERICAL INVESTIGATION OF JET CONTROL FOR ACTIVE CONTROL OF COMBUSTION INSTABILITIES

Vincent Faivre
Institut de Mécanique des Fluides Allée du Pro Camille Soula 31400 Toulouse, FRANCE

Thierry Poinsot
Institut de Mécanique des Fluides Allée du Pro Camille Soula 31400 Toulouse, FRANCE

Resumo

Controlling the mixing of a gas (usually fuel) issuing from a tube into surrounding air is a basic problem in multiple combustion systems. The purpose of the present work is to develop an actuator device to control the mixing enhancement of an axisymmetric non reactive jet. The actuators consist of four small jets feeding the primary jet flow. These four jets are oriented to add an azimutal component to the velocity field. The influence of the deflection between the axis of control and main jets will be discussed. Schlieren photographs will be used to compare the efficiency of the two configurations of interest and hot wire anemometry to quantify the effect of the control to main flow rate ratio.
Large Eddy Simulations (LES) of both forced and unforced configuration are also performed. The objectives of the numerical part of this work are to understand the actuators effect and to validate LES as a tool to study active control.